The health issue has also led to missed school days. In the past year, nearly 40% of the asthmatic children were absent from school for 1–7 days, and 9.1 % were absent for 8–14 days.

A research group from Hiroshima University has found an increase in bronchial asthma among children affected by the torrential rains in July 2018 that devastated western Japan, particularly in ...